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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { useEffect, useCallback } from 'react';
import { useCompletion } from './useCompletion.js';
import { TextBuffer } from '../components/shared/text-buffer.js';
import { Suggestion } from '../components/SuggestionsDisplay.js';
export interface UseReverseSearchCompletionReturn {
suggestions: Suggestion[];
activeSuggestionIndex: number;
visibleStartIndex: number;
showSuggestions: boolean;
isLoadingSuggestions: boolean;
navigateUp: () => void;
navigateDown: () => void;
handleAutocomplete: (i: number) => void;
resetCompletionState: () => void;
}
export function useReverseSearchCompletion(
buffer: TextBuffer,
shellHistory: readonly string[],
reverseSearchActive: boolean,
): UseReverseSearchCompletionReturn {
const {
suggestions,
activeSuggestionIndex,
visibleStartIndex,
showSuggestions,
isLoadingSuggestions,
setSuggestions,
setShowSuggestions,
setActiveSuggestionIndex,
resetCompletionState,
navigateUp,
navigateDown,
} = useCompletion();
useEffect(() => {
if (!reverseSearchActive) {
resetCompletionState();
}
}, [reverseSearchActive, resetCompletionState]);
useEffect(() => {
if (!reverseSearchActive) {
return;
}
const q = buffer.text.toLowerCase();
const matches = shellHistory.reduce<Suggestion[]>((acc, cmd) => {
const idx = cmd.toLowerCase().indexOf(q);
if (idx !== -1) {
acc.push({ label: cmd, value: cmd, matchedIndex: idx });
}
return acc;
}, []);
setSuggestions(matches);
setShowSuggestions(matches.length > 0);
setActiveSuggestionIndex(matches.length > 0 ? 0 : -1);
}, [
buffer.text,
shellHistory,
reverseSearchActive,
setActiveSuggestionIndex,
setShowSuggestions,
setSuggestions,
]);
const handleAutocomplete = useCallback(
(i: number) => {
if (i < 0 || i >= suggestions.length) return;
buffer.setText(suggestions[i].value);
resetCompletionState();
},
[buffer, suggestions, resetCompletionState],
);
return {
suggestions,
activeSuggestionIndex,
visibleStartIndex,
showSuggestions,
isLoadingSuggestions,
navigateUp,
navigateDown,
handleAutocomplete,
resetCompletionState,
};
}
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